Phylum: Basidiomycota Family: Psathyrellaceae
Coprinopsis cordispora (T. Gibbs) Watling & M.J. Richardson
Ticker Inkcap
One of a trio of species that are very similar and not easy to separate. One source notes that the most distinctive character is the presence of lageniform cheilocystidia. The five-sided spores are distinctive for this group. Found on herbivore dung and related material such as silage
References:
Doveri (2007) Fungi Fimicoli Italici
Richardson & Watling (1997) Keys to Fungi on Dung
Læssøe & Petersen (2019) Fungi of Temperate Europe, Volume 1